Hello world.exe compile error

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stack

Joined: 14 Nov 2010
Posts: 6

stack 14 Nov 2010, 09:00

Please help me to compile my Hello world program. It's ok when output format is .com, but does not work when format is format PE console.

Code:

format PE console  ;ORG 100h - it's ok when output is .com

mov dx,msg
mov ah,9h
int 21h

mov ah,10h
int 16h

int 21h

msg db "Hello World!$"

The error is: "value out of range" (line: mov dx,msg). I want to write code without FASM "invoke WriteConsole". Please help me to write the simplest exe proggy.

14 Nov 2010, 09:00

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 14 Nov 2010, 09:35

stack,

Why do you need PE with 16-bit code which won't work (under regular Windows)?

In protected mode you don't have much choice in user-mode: there are APIs you can use, there are (barely documented) OS services. None of them resemble DOS int 21h or BIOS int 16h (indeed you'll have access violation trying to use those instructions).

You don't want to use WriteConsole()? Use WriteFile() then. Wink

14 Nov 2010, 09:35

stack

Joined: 14 Nov 2010
Posts: 6

stack 14 Nov 2010, 09:47

baldr, thanks for reply. I thought that the problem in the syntax only or maybe something with ds register value Smile

14 Nov 2010, 09:47

stack

Joined: 14 Nov 2010
Posts: 6

stack 14 Nov 2010, 12:24

Hmm, "format mz" works. At least there is no any compilation error, but the output is: "()&^#(&^@#... Hello World!". How should I modify the source code to set proper output address for 21h interrupt? And I get a NTVDM.exe unstable crash...

14 Nov 2010, 12:24

drobole

Joined: 03 Nov 2010
Posts: 67
Location: Norway

drobole 14 Nov 2010, 14:13

I think it complains because dx is too small to hold a 32 bit address. If you use edx instead, the error goes away.

Still, as baldr said, there is other issues. Basically you are using old DOS interrupts that does not work in protected mode.

Are you on Windows, Linux or other system?

14 Nov 2010, 14:13

stack

Joined: 14 Nov 2010
Posts: 6

stack 14 Nov 2010, 15:25

I'm on Win7. The following code is work ok except unstable crash of NTVDM.exe on exit.

Code:

format mz
org 100h

mov edx,msg
mov ah,9h
int 21h

mov ah,10h
int 16h

int 21h

msg db "Hello World!$"

I just wanted to start with basic DOS programs for studying, because there are a lot of tutorials of them.[/code]

14 Nov 2010, 15:25

drobole

Joined: 03 Nov 2010
Posts: 67
Location: Norway

drobole 14 Nov 2010, 16:50

The interrupt to exit a com program is 20h I think, not 21h

14 Nov 2010, 16:50

stack

Joined: 14 Nov 2010
Posts: 6

stack 14 Nov 2010, 17:16

Oh, yes. I changed interrupt to exit, but the crash of NTVDM.exe still here:
Problem Event Name: APPCRASH
Application Name: ntvdm.exe
Application Version: 6.1.7600.16385
Application Timestamp: 4a5bc158
Fault Module Name: StackHash_2264

14 Nov 2010, 17:16

Alphonso

Joined: 16 Jan 2007
Posts: 295

Alphonso 15 Nov 2010, 09:47

Code:

format mz

;org 100h
push cs
pop  ds

mov dx,msg
mov ah,9h
int 21h

mov ah,0h
int 16h

mov ax,4c00h ;Use AL for error/return code
int 21h

msg db "Hello World!$"

15 Nov 2010, 09:47

stack

Joined: 14 Nov 2010
Posts: 6

stack 16 Nov 2010, 18:40

Thanks, Alphonso!

16 Nov 2010, 18:40

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